kernel: backport ubiblock support from 3.15

Backport ubiblock support from kernel 3.15 as well as all follow-up
fixes related to ubiblock.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>

 create mode 100644 target/linux/generic/patches-3.14/040-UBI-R-O-block-driver-on-top-of-UBI-volumes.patch
 create mode 100644 target/linux/generic/patches-3.14/041-UBI-block-do-not-use-term-attach.patch
 create mode 100644 target/linux/generic/patches-3.14/042-UBI-block-Mark-init-only-symbol-as-__initdata.patch
 create mode 100644 target/linux/generic/patches-3.14/043-UBI-block-Use-u64-for-the-64-bit-dividend.patch
 create mode 100644 target/linux/generic/patches-3.14/044-UBI-rename-block-device-ioctls.patch
 create mode 100644 target/linux/generic/patches-3.14/045-UBI-block-Remove-__initdata-from-ubiblock_param_ops.patch
 create mode 100644 target/linux/generic/patches-3.14/046-UBI-avoid-workqueue-format-string-leak.patch
 create mode 100644 target/linux/generic/patches-3.14/047-UBI-make-UBI_IOCVOLCRBLK-take-a-parameter-for-future.patch

SVN-Revision: 41118

1 files changed, 194 insertions, 0 deletions

diff --git a/target/linux/generic/patches-3.14/041-UBI-block-do-not-use-term-attach.patch b/target/linux/generic/patches-3.14/041-UBI-block-do-not-use-term-attach.patch
new file mode 100644
index 0000000000..bcbb92c6b2
--- /dev/null
+++ b/target/linux/generic/patches-3.14/041-UBI-block-do-not-use-term-attach.patch
@@ -0,0 +1,194 @@
+From 4d283ee2517303afa54ad6cbd9342a2f748cf509 Mon Sep 17 00:00:00 2001
+From: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
+Date: Tue, 4 Mar 2014 12:00:26 +0200
+Subject: [PATCH] UBI: block: do not use term "attach"
+
+We already use term attach/detach for UBI->MTD relations, let's not use this
+for UBI->ubiblock relations to avoid confusion. Just use 'create' and 'remove'
+instead. E.g., "create a R/O block device on top of a UBI volume".
+
+Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
+---
+ drivers/mtd/ubi/block.c | 39 ++++++++++++++++++++-------------------
+ drivers/mtd/ubi/cdev.c  |  4 ++--
+ drivers/mtd/ubi/ubi.h   | 14 ++++++++++----
+ 3 files changed, 32 insertions(+), 25 deletions(-)
+
+diff --git a/drivers/mtd/ubi/block.c b/drivers/mtd/ubi/block.c
+index cea7d1c..6402e41 100644
+--- a/drivers/mtd/ubi/block.c
++++ b/drivers/mtd/ubi/block.c
+@@ -29,10 +29,10 @@
+  *
+  *   LEB number = addressed byte / LEB size
+  *
+- * This feature is compiled in the UBI core, and adds a new 'block' parameter
+- * to allow early block device attaching. Runtime  block attach/detach for UBI
+- * volumes is provided through two new UBI ioctls: UBI_IOCVOLATTBLK and
+- * UBI_IOCVOLDETBLK.
++ * This feature is compiled in the UBI core, and adds a 'block' parameter
++ * to allow early creation of block devices on top of UBI volumes. Runtime
++ * block creation/removal for UBI volumes is provided through two UBI ioctls:
++ * UBI_IOCVOLATTBLK and UBI_IOCVOLDETBLK.
+  */
+ 
+ #include <linux/module.h>
+@@ -374,7 +374,7 @@ static const struct block_device_operations ubiblock_ops = {
+ 	.getgeo	= ubiblock_getgeo,
+ };
+ 
+-int ubiblock_add(struct ubi_volume_info *vi)
++int ubiblock_create(struct ubi_volume_info *vi)
+ {
+ 	struct ubiblock *dev;
+ 	struct gendisk *gd;
+@@ -464,7 +464,7 @@ static void ubiblock_cleanup(struct ubiblock *dev)
+ 	put_disk(dev->gd);
+ }
+ 
+-int ubiblock_del(struct ubi_volume_info *vi)
++int ubiblock_remove(struct ubi_volume_info *vi)
+ {
+ 	struct ubiblock *dev;
+ 
+@@ -503,7 +503,8 @@ static void ubiblock_resize(struct ubi_volume_info *vi)
+ 
+ 	/*
+ 	 * Need to lock the device list until we stop using the device,
+-	 * otherwise the device struct might get released in 'ubiblock_del()'.
++	 * otherwise the device struct might get released in
++	 * 'ubiblock_remove()'.
+ 	 */
+ 	mutex_lock(&devices_mutex);
+ 	dev = find_dev_nolock(vi->ubi_num, vi->vol_id);
+@@ -528,12 +529,12 @@ static int ubiblock_notify(struct notifier_block *nb,
+ 	switch (notification_type) {
+ 	case UBI_VOLUME_ADDED:
+ 		/*
+-		 * We want to enforce explicit block device attaching for
++		 * We want to enforce explicit block device creation for
+ 		 * volumes, so when a volume is added we do nothing.
+ 		 */
+ 		break;
+ 	case UBI_VOLUME_REMOVED:
+-		ubiblock_del(&nt->vi);
++		ubiblock_remove(&nt->vi);
+ 		break;
+ 	case UBI_VOLUME_RESIZED:
+ 		ubiblock_resize(&nt->vi);
+@@ -561,7 +562,7 @@ open_volume_desc(const char *name, int ubi_num, int vol_id)
+ 		return ubi_open_volume(ubi_num, vol_id, UBI_READONLY);
+ }
+ 
+-static int __init ubiblock_attach_from_param(void)
++static int __init ubiblock_create_from_param(void)
+ {
+ 	int i, ret;
+ 	struct ubiblock_param *p;
+@@ -582,7 +583,7 @@ static int __init ubiblock_attach_from_param(void)
+ 		ubi_get_volume_info(desc, &vi);
+ 		ubi_close_volume(desc);
+ 
+-		ret = ubiblock_add(&vi);
++		ret = ubiblock_create(&vi);
+ 		if (ret) {
+ 			ubi_err("block: can't add '%s' volume, err=%d\n",
+ 				vi.name, ret);
+@@ -592,7 +593,7 @@ static int __init ubiblock_attach_from_param(void)
+ 	return ret;
+ }
+ 
+-static void ubiblock_detach_all(void)
++static void ubiblock_remove_all(void)
+ {
+ 	struct ubiblock *next;
+ 	struct ubiblock *dev;
+@@ -618,13 +619,13 @@ int __init ubiblock_init(void)
+ 		return ubiblock_major;
+ 
+ 	/* Attach block devices from 'block=' module param */
+-	ret = ubiblock_attach_from_param();
++	ret = ubiblock_create_from_param();
+ 	if (ret)
+-		goto err_detach;
++		goto err_remove;
+ 
+ 	/*
+-	 * Block devices needs to be attached to volumes explicitly
+-	 * upon user request. So we ignore existing volumes.
++	 * Block devices are only created upon user requests, so we ignore
++	 * existing volumes.
+ 	 */
+ 	ret = ubi_register_volume_notifier(&ubiblock_notifier, 1);
+ 	if (ret)
+@@ -633,14 +634,14 @@ int __init ubiblock_init(void)
+ 
+ err_unreg:
+ 	unregister_blkdev(ubiblock_major, "ubiblock");
+-err_detach:
+-	ubiblock_detach_all();
++err_remove:
++	ubiblock_remove_all();
+ 	return ret;
+ }
+ 
+ void __exit ubiblock_exit(void)
+ {
+ 	ubi_unregister_volume_notifier(&ubiblock_notifier);
+-	ubiblock_detach_all();
++	ubiblock_remove_all();
+ 	unregister_blkdev(ubiblock_major, "ubiblock");
+ }
+diff --git a/drivers/mtd/ubi/cdev.c b/drivers/mtd/ubi/cdev.c
+index 39d3774..11c8473 100644
+--- a/drivers/mtd/ubi/cdev.c
++++ b/drivers/mtd/ubi/cdev.c
+@@ -567,7 +567,7 @@ static long vol_cdev_ioctl(struct file *file, unsigned int cmd,
+ 		struct ubi_volume_info vi;
+ 
+ 		ubi_get_volume_info(desc, &vi);
+-		err = ubiblock_add(&vi);
++		err = ubiblock_create(&vi);
+ 		break;
+ 	}
+ 
+@@ -577,7 +577,7 @@ static long vol_cdev_ioctl(struct file *file, unsigned int cmd,
+ 		struct ubi_volume_info vi;
+ 
+ 		ubi_get_volume_info(desc, &vi);
+-		err = ubiblock_del(&vi);
++		err = ubiblock_remove(&vi);
+ 		break;
+ 	}
+ 
+diff --git a/drivers/mtd/ubi/ubi.h b/drivers/mtd/ubi/ubi.h
+index e76ff98..2e588a9 100644
+--- a/drivers/mtd/ubi/ubi.h
++++ b/drivers/mtd/ubi/ubi.h
+@@ -868,13 +868,19 @@ int ubi_scan_fastmap(struct ubi_device *ubi, struct ubi_attach_info *ai,
+ #ifdef CONFIG_MTD_UBI_BLOCK
+ int ubiblock_init(void);
+ void ubiblock_exit(void);
+-int ubiblock_add(struct ubi_volume_info *vi);
+-int ubiblock_del(struct ubi_volume_info *vi);
++int ubiblock_create(struct ubi_volume_info *vi);
++int ubiblock_remove(struct ubi_volume_info *vi);
+ #else
+ static inline int ubiblock_init(void) { return 0; }
+ static inline void ubiblock_exit(void) {}
+-static inline int ubiblock_add(struct ubi_volume_info *vi) { return -ENOTTY; }
+-static inline int ubiblock_del(struct ubi_volume_info *vi) { return -ENOTTY; }
++static inline int ubiblock_create(struct ubi_volume_info *vi)
++{
++	return -ENOTTY;
++}
++static inline int ubiblock_remove(struct ubi_volume_info *vi)
++{
++	return -ENOTTY;
++}
+ #endif
+ 
+ 
+-- 
+1.9.2
+